/*
 * Copyright (c) 2014, Peter Thorson. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the WebSocket++ Project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifndef WEBSOCKETPP_EXTENSION_HPP
#define WEBSOCKETPP_EXTENSION_HPP

#include <websocketpp/common/cpp11.hpp>
#include <websocketpp/common/system_error.hpp>

#include <string>
#include <vector>

namespace websocketpp
{

/**
 * Some generic information about extensions
 *
 * Each extension object has an implemented flag. It can be retrieved by calling
 * is_implemented(). This compile time flag indicates whether or not the object
 * in question actually implements the extension or if it is a placeholder stub
 *
 * Each extension object also has an enabled flag. It can be retrieved by
 * calling is_enabled(). This runtime flag indicates whether or not the
 * extension has been negotiated for this connection.
 */
namespace extensions
{

namespace error
{
enum value {
  /// Catch all
  general = 1,

  /// Extension disabled
  disabled
};

class category : public lib::error_category
{
public:
  category() {}

  const char *name() const _WEBSOCKETPP_NOEXCEPT_TOKEN_
  {
    return "websocketpp.extension";
  }

  std::string message (int value) const
  {
    switch (value) {
    case general:
      return "Generic extension error";

    case disabled:
      return "Use of methods from disabled extension";

    default:
      return "Unknown permessage-compress error";
    }
  }
};

inline lib::error_category const &get_category()
{
  static category instance;
  return instance;
}

inline lib::error_code make_error_code (error::value e)
{
  return lib::error_code (static_cast<int> (e), get_category() );
}

} // namespace error
} // namespace extensions
} // namespace websocketpp

_WEBSOCKETPP_ERROR_CODE_ENUM_NS_START_
template<> struct is_error_code_enum
  <websocketpp::extensions::error::value> {
  static const bool value = true;
};
_WEBSOCKETPP_ERROR_CODE_ENUM_NS_END_

#endif // WEBSOCKETPP_EXTENSION_HPP
